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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Short-term toxicity to fish

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Administrative data

Link to relevant study record(s)

Description of key information

With high probability acutely not harmful to fish.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
100 mg/L

Additional information

For the hazard assessment of the acute toxicity to fish a read-across to the analogous substance 1,2 -epoxybutane (CAS 106-88-7) was used. Both substances reveal a comparable moelcular structure, are both readiyl biodegradable and revealed EC50 values for the acute toxicity to aquatic invertebrates which lie in the same range. Therefore, and for reasons of animal welfare the read-across is regarded as valid and no acute test on fish toxicity on 2,2 -dimethyloxiran is performed.

In the acute fish test on the analogous substance according to German national standards DIN 38412, the LC50 (96h) for Leuciscus idus was determined to be > 100 mg/L (BASF 1988).